Proof they are destroying warlocks on purpose, Zarhym mocking us on the official forums.
http://us.battle.net/wow/en/forum/to...8281?page=2#28
Deliciouswarlocktears.psd
These sort of statements couldn't be further from the truth. No set bonus and trinket combination will give any class or spec such a huge boost that every single ability needs a 25% damage reduction plus a base reduction to the effectiveness of our main stat. Especially when no set bonuses have even been announced, things like that 5000% buff to pet damage was pulled from data mining and is an obvious place holder.
Doom Bolt from using DS already hits for 34k+ average, even with those nerfs a proc for a 5000% damage increase would nearly 1 shot bosses. Even a 20k Doom Bolt with a 5000% damage increase would hit for 100,000,000 damage. Maybe the nerf to the effectiveness may have something to do with whatever that buff will end up being, but the 25% nerf to nearly every single one of our spells is nothing but punitive on the part of some developer that hates Warlocks.